This selects how frequently the switch retransmits AIS protocol data units once the AIS condition is active, choosing between a fast one-second interval and a slower one-minute interval, per the IEEE 802.1ag standard's defined AIS transmission rates. The transmission interval affects how quickly a downstream device relying on receiving AIS PDUs can detect if the AIS signal itself stops, implying the underlying fault cleared, so a faster interval gives quicker fault-clear detection at the cost of slightly more control-plane traffic. An admin in a latency-sensitive carrier network might choose one-second(1) to minimize the delay before downstream systems recognize a fault has been resolved, while a less time-critical deployment might use one-minute(2) to reduce control traffic overhead.